The correct answer is that BGP can be used to exchange routes between the hub and spokes in a hub-and-spoke route-based VPN topology. This is because a route-based VPN uses tunnel interfaces, which are treated as logical network interfaces, allowing dynamic routing protocols like BGP to run over them and automatically propagate prefixes between the hub and each spoke. On the Fortinet NSE 4 exam, this question tests your understanding of how route-based VPNs differ from policy-based VPNs, specifically that each spoke requires its own dedicated tunnel interface to the hub, and BGP eliminates the need for static route configuration. A common trap is confusing aggressive mode with dynamic routing—aggressive mode is an IKE phase 1 option, not a routing requirement. Remember the memory tip: "BGP on tunnel interfaces means no static routes, just dynamic exchange."
NSE4 Authentication and VPN Practice Question
This NSE4 practice question tests your understanding of authentication and vpn. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A network admin is configuring a hub-and-spoke VPN with three spokes. Which TWO statements are correct about route-based VPN in this topology?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Each spoke must have a route-based VPN interface configured to the hub
Option A is correct: each spoke needs a route-based tunnel to the hub. Option D is correct: BGP can be used for dynamic routing. Option B is wrong because aggressive mode is not required. Option C is wrong because each spoke needs a separate tunnel. Option E is wrong because route-based uses tunnel interfaces, not policy per tunnel.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Each spoke must have a route-based VPN interface configured to the hub
Read the scenario before looking for a memorised answer.
✗
A single firewall policy can control traffic to all spokes
Why it's wrong here
Each tunnel interface typically requires its own policies.
✓
BGP can be used to exchange routes between the hub and spokes
Why this is correct
BGP is a common dynamic routing protocol over route-based VPN.
Related concept
Read the scenario before looking for a memorised answer.
✗
Aggressive mode must be enabled for the hub to accept multiple spokes
Why it's wrong here
Main mode can also accept multiple spokes with 0.0.0.0 remote gateway.
✗
All spokes can share the same Phase 1 configuration
Why it's wrong here
Each spoke typically has its own Phase 1 with unique remote IP or PSK.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the NSE4 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which NSE4 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Authentication and VPN — This question tests Authentication and VPN — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Each spoke must have a route-based VPN interface configured to the hub — Option A is correct: each spoke needs a route-based tunnel to the hub. Option D is correct: BGP can be used for dynamic routing. Option B is wrong because aggressive mode is not required. Option C is wrong because each spoke needs a separate tunnel. Option E is wrong because route-based uses tunnel interfaces, not policy per tunnel.
What should I do if I get this NSE4 question wrong?
Identify which NSE4 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This NSE4 practice question is part of Courseiva's free Fortinet certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the NSE4 exam.
Question Discussion
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